Gas-burner for dental tables.



T. SMITH. GAS BURNER FOR DENTAL TABLES.

APPLICATION FILED OUT. 29, 1904.

Patented May 2, 1911. I

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THEODORE SMITH, OF CHICAGO, ILLINOIS, ASSIGNOR TO THEO. SMITH MANUFAC- TUBING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

GAS-BURNER FOR DENTAL TABLES.

Specification of Letters Patent.

Patented May 2, 19111.

To all whom it may concern:

Be it known that I, THEODORE SMITH, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Gas-Burners for Dental Tables, of which the following is a specification.

My invention relates to gas burners for adjustable tables, such as dental tables and the like, and has for its object to provide a new and improved device of this description.

My invention is illustrated in the accompanying drawings, wherein Figure 1 is a view of an adjustable table provided with my improved burner; Fig. 2 is an enlarged view of the portion of the device at the point where it is attached to the table; Fig. 3 is a sectional view taken on line 83, Fig. 2; Fig. A is a plan view of the wall support for the burner; Fig. 5 is a plan view of the table support for the burner.

Like letters refer to like parts through the several figures.

I have illustrated my device in connection with an adjustable table such, for example, as that used by dentists.

As shown in Fig. 1, the table A is mounted upon the stem A preferably so as to be free to rotate, as, for example, by being provided with a projecting part A which projects into the hollow of the stem A The stem A is provided at its bottom with a projection A which is clamped between the pieces A by means of the thumb screw A. Two rods B and B have their ends bent so as to form right angled pieces, the bent ends passing through loops in the pieces A and being riveted or arranged so as to be held in place. The lower ends of the rods B and B have similar right angled bends which pass through loops in similar pieces B clamped to the piece B by the screw B Between the ends of the rods B and B is a frictional clamping device which consists of two pieces, one on each side of the rods, and a clamping screw B by means of which these pieces are clamped to the rods. By this construction the clamp is frictionally attached to the rods, but permits them to slide therethrough when the rods are forcibly moved, and hence the table can be raised or lowered by applying pressure to it but will remain in any position when this pressure is removed, the frictional contact between the clamping device and the rods B and B holding the parts in any desired position. The piece B is rotatably mounted upon the upturned end O of the arm 0 which is 'rotatably mounted in the brackets C on the wall or other support. The part B is preferably split, and is frictionally clamped to the upturned end C by means of a thumb screw, C It will thus be seen that the table A may be rotated about the stem A that said stem may be rotated about the thumb screw A that the whole table may be raised and lowered, that the parts may be rotated about the upturned projecting end 0 of the arm O, and that the entire device may be rotated in the brackets C It will also be seen that the various parts will remain in any desired position, and

that a great range of adjustment is thus here secured. Associated with the table A is a Bunsen burner, D, supported upon a rigid tube, D by means of a connecting piece D The burner is removably attached to the table A. As herein shown the tube D is provided with two reduced portions, D and D*, preferably circular. Above each reduced portion is an enlargement or overhanging part, D D. The lower portion of each reduced part is cut away or flattened, as shown at D Figs. 2 and 3. Connected with the table A are two projecting holding pieces E and E each provided with an opening E having a contracted outlet E When it is desired to attach the burner to the table, the flattened portions D are brought opposite the holding pieces E and E as shown, for example, in Fig. 2. When in this position the tube can be forced into the openings E in the holding pieces. If, now, the tube is released, it drops down to the position shown in Fig. l where the cross sectional area of the tube is greater than the contracted opening E and hence the tube will be held in place, and can only be removed by again lifting it up so that the cut portions D come opposite the holding pieces. The reduced portions D and D*, as before stated, are preferably circular, and the openings E are shaped so that the tube is free to rotate in the holding pieces E and E The tube D is preferably provided with an angular piece F to which is attached a flexible tube G connecting the Bunsen burner with an outlet G The tube G is preterably made so as to resist torsional strain. I have shown in Fig. 2 a form of tube by means of which this result will be secured, and consisting of a flexible inner tube Gr surrounded by a coil of wire or other rigid material, G the whole covered with a me tallic armor, G, consisting of metallic strands braided about the inner tube and coil. The tube G is preferably provided at each end with a sleeve, G, and these sleeves are connected to the outlet and the part F of the tube D so as to be movable with relation thereto. This connection is secured by providing the sleeves with slots or grooves, G", there being a screw or pin, G passing through these slots or grooves, and engaging the part to which the sleeve is connected. It will be seen that the sleeve may be partially rotated about the piece to which it is connected so as to relieve the torsional strain in the event the parts are moved to a position where this becomes necessary. A supporting device for the burner, comprising the pieces H and H is also placed near the wall or support for the arm G, as shown in Fig. 1, so that the burner may be supported in a place where it will be out of the way when it is not in use.

It will be seen that by this construction the table and the burner may be moved against the wall or to some position where it is out of the way when not in use, and that the table may then be swung out to its operative position and moved to any desired position. The burner may then be readily attached to it, and will adjust itself to the various positions of the table. It will further be seen that the burner will ordinarily project over the table, as shown in full lines in Fig. l, and that if it is desired to have the table clear of the burner it is only necessary to partially rotate it when the burner, will take the position shown in dotted lines in Fig. 1, thus being entirely out of the way, and leaving the whole table free. hen, for example, the table is rotated about the stem A the tube I) rotates in the holding pieces E and E thus keeping the burner in the same relative position so that when on the opposite side it will project beyond the table, instead of over it. The characteristic of the tube G, by means of which it resists torsional strain, automatically causes this rotation and insures the proper position of the burner when the table is rotated.

I have shown my invention as applied to a table for dentists, but it is of course evident that it may be used in any desired connection. I have also shown the burner as adapted for a gas burner, but it is of course evident that the same arrangement may be used for electric burners, or similar devices.

I claim:

1. The combination with a table movably mounted upon a support, of a burner removably connected therewith, a connection from said burner to a supply outlet on the wall, and a connection from said table to a stationary support, both connections adjustable so that the table can be rotated without rotating the burner with relation to the supply outlet.

2. The combination with a rotatable table of a burner comprising a tube, a gas supply connection with said tube, a holding device connected with said table into which said tube is received, the tube projecting on each side of the holding device, and rotatably mounted therein with relation to said table, so as to be changed in position by rotating said table.

3. The combination with a rotatable table of a burner comprising a tube, a gas supply connection with said tube, a holding device connected with said table into which said tube is received, the tube projecting on each side of the holding device, and rotatably mounted therein with relation to said table, said tube adapted to be removed from the holding device when in a predetermined position.

4. The combination with a movable table of a burner rotatably attached thereto and a flexible connection from the burner to a source of supply, the burner and the table adapted to have a relative movement with respect to each other when the table is moved, said relative movement responsive to the movement 01": said table.

5. The combination with a table of a support upon which it is rotatably mounted, a burner detachably attached to said table at the edge thereof, a part connected with the burner and adapted to project over the table, a supply connection leading to said burner, the parts arranged to automatically vary the relative position of the burner and the table when the table is rotated so as to cause the burner to project beyond the table and leave the space above the table free.

6. The combination with a table of an adjustable support by means of which it is adjustably held in position, a burner associated with said table, a holding device projecting outwardly from the edge of the table and to which said burner is removably and rotatably attached in a plane outside of the boundary of the table, and a flexible connection between the burner and a source of supply.

7 The combination with a rotatable table of a burner, a tube to which said burner is connected, a source of supply, connections therefrom to the burner, two separated holding pieces projecting from the edge of the table and provided with openings having contracted outlets, said tube having two reduced portions adapted to be received in the openings in said holding pieces and cut away at their lower parts so as to permit entrance into the contracted outlet of the holding pieces, the reduced portions of the tube above the cut away portions being too large to permit the lateral removal of the tube from the holding pieces.

8. A holding device for burners comprising a supporting part, two separated holding pieces connected thereto, the burner having two reduced portions adapted to be received in said holding pieces during the process of attaching the burner thereto, said holding pieces arranged so that the reduced portions move to a position out of alinement with the holding pieces when the burner is in its normal position.

9. The combination with a burner of a tube associated therewith, a supporting part, two separated holding pieces connected to said supporting part and provided with openings having contracted outlets, said tube having two reduced portions adapted to be received in the openings in said holding pieces and cut away at their lower parts so as to permit entrance into the contracted outlets of the holding pieces, the reduced portions of the tube above the cut away portions being larger in cross sectional area than the contracted outlets of the holding pieces.

10. A holding device for burners comprising a rotatably mounted supporting part, two separated holding pieces connected with said supporting part and engaging the burner at difierent points.

11. A holding device for burners, comprising a supporting part, two separated holding pieces connected thereto, the burner having two reduced portions adapted to be received in said holding piece during the process of attaching the burner thereto, said holding pieces arranged so that the burner is loosely and rotatably held in place.

THEODORE SMITH.

Witnesses:

HOMER L. KRAFT, LUCY A. FALKENBERG.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of ".Patents, Washington, D. G. 

